Multipart is a way of forming HTTP requests or responses to contain multiple distinct parts.
Such an approach allows a request to contain multiple different pieces of data with potentially conflicting data types in a single response payload.
It is typically used either in html forms, or when uploading multiple files.
The structure of a multipart request is typically consistent of:
- A Header: Typically
multipart/form-data;boundary=<boundary>, This defines the HTTP message as being multipart, as well as defining the separator used to distinguish the different parts.
- 1 or more parts:
- Part header: typically
content-disposition: mime/type; name="<fieldname>"(
mime/typeshould be replaced with the actual mime-type), can also contain a
filenameproperty (separated from the rest by a
;and structured similarly to the
Crow supports multipart requests and responses though
A message can be created either by defining the headers, boundary, and individual parts and using them to create the message. or simply by reading a
Once a multipart message has been made, the individual parts can be accessed throught
parts is an
std::vector, so accessing the individual parts should be straightforward.
In order to access the individual part's name or filename, something like
mpmes.parts.headers.params["name"] sould do the trick.
For more info on Multipart messages, go here